916467221 has 2 divisors, whose sum is σ = 916467222. Its totient is φ = 916467220.

The previous prime is 916467203. The next prime is 916467271. The reversal of 916467221 is 122764619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 741963121 + 174504100 = 27239^2 + 13210^2 .

It is a cyclic number.

It is not a de Polignac number, because 916467221 - 2⁶ = 916467157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (916467271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458233610 + 458233611.

It is an arithmetic number, because the mean of its divisors is an integer number (458233611).

Almost surely, 2^916467221 is an apocalyptic number.

It is an amenable number.

916467221 is a deficient number, since it is larger than the sum of its proper divisors (1).

916467221 is an equidigital number, since it uses as much as digits as its factorization.

916467221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 916467221 is about 30273.2096250133. The cubic root of 916467221 is about 971.3423230427.

The spelling of 916467221 in words is "nine hundred sixteen million, four hundred sixty-seven thousand, two hundred twenty-one".